TY  - RPRT
TI  - Methacholine availability for bronchial challenge testing.
AU  - T J Witek
AU  - E N Schachter
PY  - 1987
DO  - 10.1164/arrd.1987.135.2.514
UR  - https://pubmed.ncbi.nlm.nih.gov/3544987/
ID  - 3544987
ER  -